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// SPDX-License-Identifier: GPL-2.0
/*
* slg7xl45106_i2c_gpo driver
*
* Copyright (C) 2021 Xilinx, Inc.
*/
#include <common.h>
#include <errno.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <dm.h>
#include <i2c.h>
#include <dt-bindings/gpio/gpio.h>
#include <asm/arch/hardware.h>
#define SLG7XL45106_REG 0xdb
static int slg7xl45106_i2c_gpo_direction_input(struct udevice *dev,
unsigned int offset)
{
return 0;
}
static int slg7xl45106_i2c_gpo_xlate(struct udevice *dev,
struct gpio_desc *desc,
struct ofnode_phandle_args *args)
{
desc->offset = (unsigned int)args->args[0];
desc->flags = (args->args[1] & GPIO_ACTIVE_LOW ? GPIOD_ACTIVE_LOW : 0);
return 0;
}
static int slg7xl45106_i2c_gpo_set_value(struct udevice *dev,
unsigned int offset, int value)
{
int ret;
u8 val;
ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1);
if (ret)
return ret;
if (value)
val |= BIT(offset);
else
val &= ~BIT(offset);
return dm_i2c_write(dev, SLG7XL45106_REG, &val, 1);
}
static int slg7xl45106_i2c_gpo_direction_output(struct udevice *dev,
unsigned int offset, int value)
{
return slg7xl45106_i2c_gpo_set_value(dev, offset, value);
}
static int slg7xl45106_i2c_gpo_get_value(struct udevice *dev,
unsigned int offset)
{
int ret;
u8 val;
ret = dm_i2c_read(dev, SLG7XL45106_REG, &val, 1);
if (ret)
return ret;
return !!(val & BIT(offset));
}
static int slg7xl45106_i2c_gpo_get_function(struct udevice *dev,
unsigned int offset)
{
return GPIOF_OUTPUT;
}
static const struct dm_gpio_ops slg7xl45106_i2c_gpo_ops = {
.direction_input = slg7xl45106_i2c_gpo_direction_input,
.direction_output = slg7xl45106_i2c_gpo_direction_output,
.get_value = slg7xl45106_i2c_gpo_get_value,
.set_value = slg7xl45106_i2c_gpo_set_value,
.get_function = slg7xl45106_i2c_gpo_get_function,
.xlate = slg7xl45106_i2c_gpo_xlate,
};
static int slg7xl45106_i2c_gpo_probe(struct udevice *dev)
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
const void *label_ptr;
label_ptr = dev_read_prop(dev, "label", NULL);
if (label_ptr) {
uc_priv->bank_name = strdup(label_ptr);
if (!uc_priv->bank_name)
return -ENOMEM;
} else {
uc_priv->bank_name = dev->name;
}
uc_priv->gpio_count = 8;
return 0;
}
static const struct udevice_id slg7xl45106_i2c_gpo_ids[] = {
{ .compatible = "dlg,slg7xl45106",},
{ }
};
U_BOOT_DRIVER(slg7xl45106_i2c_gpo) = {
.name = "slg7xl45106_i2c_gpo",
.id = UCLASS_GPIO,
.ops = &slg7xl45106_i2c_gpo_ops,
.of_match = slg7xl45106_i2c_gpo_ids,
.probe = slg7xl45106_i2c_gpo_probe,
};
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